| Message ID | ydd4nw19q6c.fsf@manam.CeBiTec.Uni-Bielefeld.DE |
|---|---|
| State | New |
| Headers | show |
> 2011-02-25 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> > > PR target/47852 > * configure.host (irix6.5*): Add -lpthread to OPT_LDFLAGS. > OK -benjamin
# HG changeset patch # Parent dc4f565925904068ffc3f7444fbc4f73ebfdcd07 Link libstdc++ with -lpthread on IRIX 6 (PR target/47852) diff -r dc4f56592590 libstdc++-v3/configure.host --- a/libstdc++-v3/configure.host Tue Feb 22 15:54:16 2011 +0000 +++ b/libstdc++-v3/configure.host Fri Feb 25 19:39:22 2011 +0100 @@ -252,6 +252,10 @@ os_include_dir="os/irix/irix6.5" atomicity_dir=os/irix atomic_word_dir=os/irix + # libstdc++.so relies on emutls on IRIX, which only works with the + # real functions implemented in libpthread.so, not with the stubs in + # libc, so always pass -lpthread. + OPT_LDFLAGS="${OPT_LDFLAGS} -lpthread" ;; mingw32*) os_include_dir="os/mingw32"
When PR target/47852 was filed last year, it turned out that this seemed to be the same problem as PR target/45693 on Tru64 UNIX, i.e. stub implementations of pthread functions getting in the way, although I couldn't really figure out how this happens. Since the problem on IRIX didn't show up anywhere in the testsuite and seemed to be a weird corner case, I all but forgot about it. Recently, though, a couple of 30_threads testcases started to fail: FAIL: 30_threads/future/cons/move_assign.cc execution test FAIL: 30_threads/shared_future/cons/assign.cc execution test FAIL: 30_threads/shared_future/cons/move_assign.cc execution test like this: terminate called after throwing an instance of 'std::system_error' what(): Function not implemented Abort It turns out that __gthread_cond_broadcast in void condition_variable::notify_all() noexcept { int __e = __gthread_cond_broadcast(&_M_cond); // XXX not in spec // EINVAL if (__e) __throw_system_error(__e); } returns ENOSYS due to a stub for pthread_cond_broadcast in libc. Linking libstdc++.so with -lpthread fixes those tests. I've relinked libstdc++.so with -lpthread using the patch below and rerun the libstdc++-v3 testsuite, where all 3 testcases pass now. I'll include the patch in the next full mips-sgi-irix6.5 bootstrap this weekend. Ok for mainline if that passes? Thanks. Rainer 2011-02-25 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> PR target/47852 * configure.host (irix6.5*): Add -lpthread to OPT_LDFLAGS.